Quote:
Originally Posted by X53Jay4.8is
Isn't it amazing how an BMW E39 M5 is more reliable than the V8 X5?  |
That's because the S62 is a very overengineered version of the M62tu since it was built for more intense usage. The BMW Motorsport engineers took the M62tu and fixed a lot of its flaws when building the S62— they installed a dual-row timing chain which solved the chain guide issues, they installed a better cooling system, they installed a lower temperature thermostat that prolongs the life of the cooling system, and they reinforced a lot of the engine internals.
I think that the S62 is what the M62tu would have been if the bean counters hadn't stepped in. All of the technologies in the S62 were already available when the M62tu was created (double-Vanos was on the Euro S50 M3 engines, dual-row timing chain in the previous M60 engine).